GB1240588A - Improvements in or relating to communication control systems - Google Patents
Improvements in or relating to communication control systemsInfo
- Publication number
- GB1240588A GB1240588A GB36078/69A GB3607869A GB1240588A GB 1240588 A GB1240588 A GB 1240588A GB 36078/69 A GB36078/69 A GB 36078/69A GB 3607869 A GB3607869 A GB 3607869A GB 1240588 A GB1240588 A GB 1240588A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carrier
- trains
- information
- category
- transmission line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 abstract 4
- 239000000969 carrier Substances 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/28—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium using the near field of leaky cables, e.g. of leaky coaxial cables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/04—Frequency-transposition arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
1,240,588. Radio communication system. JAPANESE NATIONAL RAILWAYS, MITSUBISHI DENKI K.K., and SUMITOMO ELECTRIC INDUSTRIES Ltd. 17 July, 1969 [30 July, 1968], No. 36078/69. Heading H4L. A system is described for communication between a central fixed station 1, Fig. 3, and a plurality of trains moving along a railway track. The information to be communicated may be divided into two categories:- (1) Information which is to be received by all the trains, e.g. common train control, telephone, television, radio; (2) Information which is to be received by those trains on a selected track section only, e.g. anti-collision data. A leaky transmission line 2, e.g. Fig. 2, is run along the track from the central station and is interrupted at the beginning of each track section by a frequency selection and conversion means 30 1 , 30 2 .... Information in category 1 is modulated on to a high-frequency carrier F 3 , which is passed unchanged by all the means 30 and is radiated by the leaky transmission line along all its length to all the trains. Information in category 2 for trains on the 1st, 2nd and 3rd track sections for example are modulated on low frequency carriers f 1 , f 2 , f 3 respectively. Means 30 selects carrier f 1 and converts it to a high-frequency carrier F 1 which radiates from the transmission line to the required train. The means 30 2 does not let the carrier F 1 pass to the next section. Likewise, means 30 2 converts carrier f 2 to carrier F 1 for radiation to the required train. The trains may communicate with the central station 1, Fig. 5, by coupling into the transmission line on a common high frequency F 2 . Means 30 1 , 30 2 , 30 3 convert this down to f<SP>1</SP> 1 , f<SP>1</SP> 2 , f<SP>1</SP> 3 respectively for passage to the central station and stop the passage of carrier F 2 from its initial section to the next. Ground stations 31, Fig. 6, may be connected to the means 30 1 &c. and may communicate with the central station 1 using common highfrequency carriers F<SP>1</SP> 3 , F<SP>1</SP> 4 (category 1, outward and inward) and F<SP>1</SP> 1 , F<SP>1</SP> 2 (category 2, outward and inward) and individual section low frequencies f<SP>11</SP> 1 , f<SP>11</SP> 2 ... f<SP>11</SP> n (outward) and f<SP>111</SP> 1 , f<SP>111</SP> 2 ... f<SP>111</SP> n (inward), in the same manner as described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5409968 | 1968-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1240588A true GB1240588A (en) | 1971-07-28 |
Family
ID=12961160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36078/69A Expired GB1240588A (en) | 1968-07-30 | 1969-07-17 | Improvements in or relating to communication control systems |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3629707A (en) |
| DE (1) | DE1938805C3 (en) |
| GB (1) | GB1240588A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2242338A (en) * | 1990-03-05 | 1991-09-25 | Hunting Eng Ltd | Leaky feeder communication system |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5122683B1 (en) * | 1970-06-12 | 1976-07-12 | ||
| US3729740A (en) * | 1971-01-20 | 1973-04-24 | Sumitomo Electric Industries | Vehicle antenna for vehicular communication system using leaky coaxial cable |
| US3766378A (en) * | 1971-06-03 | 1973-10-16 | Japan National Railway | Moving object automatic operation system |
| GB1402419A (en) * | 1971-11-02 | 1975-08-06 | Microwave & Electronic Syst | Target detection system |
| US3781725A (en) * | 1972-05-04 | 1973-12-25 | Sumitomo Electric Industries | Leaky coaxial cable |
| GB1371291A (en) * | 1972-05-09 | 1974-10-23 | Coal Industry Patents Ltd | Radio frequency communication systems |
| BE799885R (en) * | 1972-05-26 | 1973-09-17 | Thomson Csf | IMPROVEMENTS TO INTERCOMMUNICATION DEVICES WITH LIMITED RADIATION, |
| GB1497288A (en) * | 1975-03-07 | 1978-01-05 | Coal Ind | Telecommunication system |
| GB1597125A (en) * | 1977-08-24 | 1981-09-03 | Bicc Ltd | Radiating cables |
| FR2607769B1 (en) * | 1986-12-08 | 1989-02-03 | Alsthom | SYSTEM FOR TWO-WAY TRANSMISSION OF INFORMATION BETWEEN A GROUND STATION AND A STATION ON A RAIL VEHICLE |
| US5136225A (en) * | 1989-04-14 | 1992-08-04 | Gec Alsthom Sa | Device for guiding vehicles on a virtual track |
| FR2675761B1 (en) * | 1991-04-24 | 1995-05-19 | Sncf | SYSTEM FOR TRANSMITTING INFORMATION BETWEEN THE GROUND AND MOBILES, PARTICULARLY IN GROUND-TRAINS COMMUNICATIONS. |
| FR2680876B1 (en) * | 1991-08-30 | 1993-11-19 | Gec Alsthom Sa | MICROWAVE ELECTROMAGNETIC WAVE LOCATION SYSTEM. |
| FR2744865B1 (en) * | 1996-02-09 | 1998-03-20 | Gec Alsthom Transport Sa | INFORMATION TRANSMISSION DEVICE AND METHOD FOR RADIANT WAVEGUIDE SYSTEM |
| FR2801749B1 (en) * | 1999-11-26 | 2002-11-15 | Matra Nortel Communications | RADIOCOMMUNICATION INSTALLATION WITH LOSS CABLES AS RADIANT ELEMENTS |
| NZ563105A (en) * | 2007-11-02 | 2010-03-26 | Auckland Uniservices Ltd | Communications system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2808584A (en) * | 1954-01-29 | 1957-10-01 | Bell Telephone Labor Inc | Directional radiator |
| US2818565A (en) * | 1956-09-05 | 1957-12-31 | James S Ajioka | Slab excited continuous slot antenna |
| US2929065A (en) * | 1957-02-27 | 1960-03-15 | Hughes Aircraft Co | Surface wave antenna |
| US3305682A (en) * | 1963-07-26 | 1967-02-21 | Gen Electric | Ranging system |
| US3517315A (en) * | 1967-06-21 | 1970-06-23 | Itt | Mobile telephone transmitter selector circuit |
-
1969
- 1969-07-17 GB GB36078/69A patent/GB1240588A/en not_active Expired
- 1969-07-28 US US845167A patent/US3629707A/en not_active Expired - Lifetime
- 1969-07-30 DE DE1938805*A patent/DE1938805C3/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2242338A (en) * | 1990-03-05 | 1991-09-25 | Hunting Eng Ltd | Leaky feeder communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1938805C3 (en) | 1974-08-29 |
| DE1938805A1 (en) | 1970-02-19 |
| DE1938805B2 (en) | 1974-02-07 |
| US3629707A (en) | 1971-12-21 |
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